云南省松墨天牛生物学特性和地理分布研究

Bionomics and geographical distribution of Monochamus alternatus Hope (Coleoptera:Cerambycidae) in Yunnan Province

松墨天牛是云南省近年来危害云南松最为严重的蛀干害虫之一。该虫在滇中地区 1a发生 1代 ,以 3、4龄幼虫在寄主枝干的木质部内越冬。成虫 3月下旬羽化 ,4月上、中旬为羽化盛期。由于该虫在云南省的寄主分布广 ,繁殖条件适宜 ,加之扩散途径多、种群密度大等因素 ,致使分布范围迅速扩散 ,造成极大的直接和潜在危害。

Monochamus alternatus is one of the important trunk borers severely endangering Pinus yunnanensis in Yunnan Province.The insect has one generation a year in central Yunnan Province and overwinters as the 3rd or 4th instar larvae in the xylem tunnel of the trunk and branch of its host.Its adults appear in late March,with a peak in mid April.The reasons for the fast spread of the insect in Yunnan Province are extensive distribution of its hosts,suitable reproductive condition,high population density,multiple spreading ways,and so on,which lead to the direct and potential endangerment.In the paper the control measures is proposed in accordance with the destruction characters of the pine sawyer in Yunnan Province.